Audi S6 (2016) is 48 mm (1.89 inch) higher and 6 kg (13 lbs) lighter than BMW 6 Series Gran Coupe (2017).
BMW 6 Series Gran Coupe (2017) is 78 mm (3.07 inch) longer, 21 mm (0.83 inch) wider and has 60 liters (2.12 ft3) bigger cargo space than Audi S6 (2016).
